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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Foreign currency translations (Details)
Dec. 31, 2019
Rp / RM
Rp / ¥
Rp / €
Rp / $
Rp / $
Dec. 31, 2018
Rp / RM
Rp / ¥
Rp / €
Rp / $
Rp / $
Buy | USD    
Foreign currency translations    
Foreign currency translations 13,880 14,375
Buy | Australian dollar    
Foreign currency translations    
Foreign currency translations 9,724 10,157
Buy | Euro    
Foreign currency translations    
Foreign currency translations | Rp / € 15,559 16,432
Buy | Yen    
Foreign currency translations    
Foreign currency translations | Rp / ¥ 127.76 130.56
Buy | Malaysian ringgits    
Foreign currency translations    
Foreign currency translations | Rp / RM 3,390 3,474
Sell | USD    
Foreign currency translations    
Foreign currency translations 13,885 14,385
Sell | Australian dollar    
Foreign currency translations    
Foreign currency translations 9,729 10,167
Sell | Euro    
Foreign currency translations    
Foreign currency translations | Rp / € 15,571 16,446
Sell | Yen    
Foreign currency translations    
Foreign currency translations | Rp / ¥ 127.82 130.70
Sell | Malaysian ringgits    
Foreign currency translations    
Foreign currency translations | Rp / RM 3,394 3,480